Fire-extinguisher.



PATENTED MAR. 17, 1908.

W. A.1BRADSHAW. FIRE EXTINGUISHER. APPLICATION FILED NOV. 5. 1907.

l/VV NTOR Z 0 v Allorney position as shown in '2,

The tank 1 is pro ed at its open end UNITED STATES PATENT OFFICE.

WILLIS A. BRADSHAW, OF CHARLOTTE, NORTH CAROLINA, ASSIGNOR OF ONE-HALF TO I MORTIMER A. BLAND, OF CHARLOTTE, NORTH CAROLINA.

FmE- xTmeUisHEn.

Specification of Letters Patent.

Patented March 17, 1908.

To all whom it may concern:

Be it known that I, WILLIS A. BRADSHAW, of Charlotte, in the county of Mecrlenbur and State of North Carolina, have invente certaln new and useful Im rovements in Fire-Extinguishers; and I do ereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in fire extinguishers.

In the portable chemical extinguishers now in use, the solution and as, are ejected In a small stream through the hose nozzle which is held in the hand and-manipulated to direct the stream against the fire.

The object of my invention is to provide means for converting the stream into a fanlike spray or curtain which will cover a greater area than-a single solid stream.

A further object is to rovide means for automatically inverting t e tank and starting the apparatus when the temperature in the room, where the extinguisher is located, reaches a predetermined point. i

A further object is to so construct the extinguisher that the solution ejected therefrom operates to impart a swinging motion to the extinguisher thus increasing the area protected by the extinguisher.

With these ends in view In invention consists in the parts and com inations of parts as will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in elevation of my improvement, showing the tank in its upright position. Fig. 2 is a similar view showing it inverted.

Fig. 3 is a view in section through the tank and removable cap and Fig. 4 is a plan view of the latter.

1 represents a'cylindrical tank preferably rovided at its lower end with a flange 2 aving diametrically opposed openings for the passage of the rod 3 secured to the post or wall 4. In its normal position as shown in Fig. 1 this tank 1 rests-on and above the rod 3 and is retained in its u right position b a wire or other device 5 aving a plug tli at will fuse when the temperature reaches a predetermined point, and thus release the tank and permit it to swing to its inverted with a neck 6 havin an inclined ground when t e cap is turned in a direction to 0 en the tank, the beveled face of the head wil be moved away from its seat on the neck, and When turned in the op osite direction, the two'ground beveled sur aces will be brought into close contact, thus formingan air tight joint between the parts.

The tank is provided internally adjacent to its neck with a tube or chamber 10, preferably made of lead, for containing a chemical. This chamber is open at its top and bottom, and is -provided intermediate its ends above the normal water line, with a perforated diaphragm 11 on which the acid or other chemlcals or vessel containing fluid acid, or chemical rests and is also provided at its upper end with perforation 12.

When the tank is inverted the soda or other solution entering the lower end of the tube and through the perforation 12 in said tube, comes in contact with the acid or other chemical contained in the tube, thus evolving a gas, which producing a pressure within the tank, forces out the water saturated with the gas, through the hose or pipe 13, connected to the tank adjacent to the upper end of the latter. The cap 8 is provided with a handle 14 which, when the cap 8*is seated on the neck of the tank, is engaged by the stops 15 and held against latera movement.

the cap to be turned in a direction the tank.

The cap is provided on its top or outer face with a concaved recess 16 into which the nozzle17' rojects, the hose or pipe 15 passing throug' the side Wall of the cap 8 so as to bring the nozzle within pointing toward, the concave recess, at or near the center of the to open One I stop is necessarily movable so as to permit Vith this arrangement, the solution, as it issues in a stream from the nozzle, impin es against the concave face of the cap an is broken up into a fan like s ray or curtain, which covers a considerab y greater area than a single solid stream, thus using the solution more effectively and economically,-

than if usedin the form of a single stream. This stream impinging on the cap, together with the spray projected from the cap, causes the tank 1 to have a swinging movement on its supporting rod 3, thus covering and protecting a reater area than can possibly be covered y a fixed tank, and also covering places where it would be dangerous or im ossible for a person to enter with a porta le extinguisher.

With this apparatus, when the temperature reaches a predetermined oint, the fuse melts, thus permitting the ta to turn from its upright to its inverted position. As soon as it is inverted, the mixture of the acid with the solution generates a gas the pressure of which'forces out the solution and gas in the well known manner.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of my invention hence I would have it understood that I do not wish to confine myself to the exact construction shown and described, but,

Having fully described my invention what I claim as new and desire to secure by Letter's-Patent, is

1. In a fire extinguisher, the combinationwith a tank having a concavity in one end, of a pipe having a nozzle the latter discharging against the curved wall-of the concavity at the end of-the tank in a direction at an angle to the longitudinal axis of the tank.

2. In afire extinguisher the combination with a tank and a cap closing one end thereof the said cap having a concavity in its outer face, of a tube for discharging the solution against the curved'face of the concavity in the outer face of the cap.

-3. In a fire extinguisher, the combination with a' tank having an open end the latter being beveled, of a cap pivoted to the tank and correspondingly beveled, whereby a turning movement of the cap in one direction carries its beveled surface away from the seat on the tank, and a movement in the opposite direction carries its beveled face into contact with the beveled seat on the tank.

4. In a fire extinguisher the combination with a tank having a beveled seat the latter having a round face, of a cap pivoted to the tank and having a beveled and ground face, and means for locking the cap against turning movement.

5. In a fire extinguisher the combination with a pivoted tank having a concavity in its upper end and fusible means for holding the tank in its upright position, of a discharge tube the nozzle of which projects the solution against the wall of said concavity in the upper end of the tank when the latter is inverted and in a direction at an angle to-the longitudinal axis of the tank.

6. In a fire extinguisher, the combination with a pivoted tank having a concavity in its cap, and fusible means for holdin the tank in its u right position, of a disc large pipe the nozz e of which discharges the solution against the face of the concavity in the,

cap in a lateral direction.

7. In a fire extinguisher, the combination with a pivoted tank having a beveled seat, a cap pivoted to the tank and havin a beveled face adapted to make contact wit 1 the beveled seat on the tank, the said cap havin a concave outer face, and fusible means or holding the tank in its upright position, of a discharge pipe the nozzle of which discharges the solution against the concave outer face of the cap.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

WILLIS A. BRADSHAW. Witnesses M. M. TAYLOR, F. F. JoNEs. 

